<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <!-- 提示 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        align-center=""
        finish-status="success"
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tabs标签页 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          :tab-position="tabPosition"
          v-model="activeIndex"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane
            name="0"
            label="基本信息"
          >
            <el-form-item
              label="商品名称"
              prop="goods_name"
            >
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item
              label="商品价格"
              prop="goods_price"
              type="number"
            >
              <el-input v-model="addForm.goods_price"></el-input>
            </el-form-item>
            <el-form-item
              label="商品重量"
              prop="goods_weight"
              type="number"
            >
              <el-input v-model="addForm.goods_weight"></el-input>
            </el-form-item>
            <el-form-item
              label="商品数量"
              prop="goods_number"
              type="number"
            >
              <el-input v-model="addForm.goods_number"></el-input>
            </el-form-item>
            <el-form-item
              label="商品分类"
              prop
            >
              <el-cascader
                v-model="addForm.goods_cat"
                :props="cateProps"
                :options="catelist"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            name="1"
            label="商品参数"
          >
            <!-- 渲染表单tab项 -->
            <el-form-item
              :key="item.attr_id"
              v-for="item in manyTabData"
              :label="item.attr_name"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  border=""
                  :key="i"
                  v-for="(item,i) in item.attr_vals"
                  :label="item"
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            name="2"
            label="商品属性"
          >
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTabData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane
            name="3"
            label="商品图片"
          >
            <!-- action图片上传的后台api地址 -->
            <el-upload
              action="http://127.0.0.1:8888/api/private/v1/upload"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headersObj"
              :on-success="handleSuccess"
            >
              <el-button
                size="small"
                type="primary"
              >点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane
            name="4"
            label="商品内容"
          >
            <!-- 富文本编辑器 -->
            <quill-editor
              v-model="addForm.goods_introduce"
            />
            <el-button type="primary" class="btn-add" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="priveiewDialogVisible"
      width="50%"
    >
      <img
        style="width: 100%;"
        :src="previewPath"
        alt=""
      >
    </el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'

export default {
  data() {
    return {
      activeIndex: 0,
      tabPosition: "left",
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: [],
        //地址数组图片
        pics: [],
        //文本内容
        goods_introduce: "",
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: "请输入商品名称", trigger: "blur" },
        ],
        goods_price: [
          { required: true, message: "请输入商品价格", trigger: "blur" },
        ],
        goods_weight: [
          { required: true, message: "请输入商品重量", trigger: "blur" },
        ],
        goods_number: [
          { required: true, message: "请输入商品数量", trigger: "blur" },
        ],
      },
      //商品分类信息
      catelist: [],
      cateProps: {
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      //商品动态参数
      manyTabData: [],
      //静态属性
      onlyTabData: [],
      //图片请求头
      headersObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      //图片路径
      previewPath: "",
      priveiewDialogVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get("categories");
      if (res.meta.status !== 200)
        return this.$message.error("获取商品分类失败！");
      this.catelist = res.data;
    },
    //级联选择器值变化
    handleChange() {
      //  console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
        this.$message.error("只能选择三级分类");
      }
    },
    //tab选择器跳转条件
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === "0" && this.addForm.goods_cat.length !== 3) {
        this.$message.error("请先选择商品分类");
        return false;
      }
    },
    //tab选中时触发函数
    async tabClicked() {
      if (this.activeIndex === "1") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "many" } }
        );
        // console.log(this.cateId, res);
        if (res.meta.status !== 200)
          return this.$message.error("获取商品参数失败");
        res.data.forEach((item) => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(" ");
        });
        this.manyTabData = res.data;
      } else if (this.activeIndex === "2") {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          { params: { sel: "only" } }
        );
        // console.log(this.cateId, res);
        if (res.meta.status !== 200)
          return this.$message.error("获取静态属性失败");
        this.onlyTabData = res.data;
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      this.previewPath = file.response.data.url;
      this.priveiewDialogVisible = true;
    },
    //删除图片时
    handleRemove(file) {
      const filePath = file.response.data.tmp_path;
      const i = this.addForm.pics.findIndex((x) => x.pic === filePath);
      this.addForm.pics.splice(i, 1);
    },
    //上传图片成功时
    handleSuccess(response) {
      // console.log(response);
      const picInfo = { pic: response.data.tmp_path };
      this.addForm.pics.push(picInfo);
    },
    //添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项目');
        //执行添加的业务逻辑
        //深拷贝
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(',');
        //处理动态参数
        this.manyTabData.forEach(item=> {
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals.join(' ')}
          this.addForm.attrs.push(newInfo);
        });
        //处理静态属性
        this.onlyTabData.forEach(item => {
          const newInfo = {attr_id: item.attr_id, attr_value: item.attr_vals};
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;
        // console.log(form);
        //发起请求
        const {data: res} = await this.$http.post('goods', form);
        if (res.meta.status !== 201)
        return this.$message.error("添加商品失败！");
        this.$message.success("添加商品成功！");
        this.$router.push('/goods');
      });
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      }
      return null;
    },
  },
};
</script>

<style lang="stylus" scoped>
.el-card {
  margin-top: 15px;

  .el-steps {
    margin: 15px 0;

    .el-step__title {
      font-size: 13px;
    }
  }

  .el-checkbox {
    margin: 0 15px 0 0 !important;
  }

  .btn-add {
    margin-top 15px
  }
}

</style>